It is 4/10 of moles is this ane halp?
Solid
, Inorganic,
Naturally Orcurring,
Defintite
Chemical Compostion,
Definite Crystalline Structure
5 Physical Properties
Hardness,
Color,
Crystal Shape,
Streak
We need the reading for this I think
'cause alphe-particle which was +ve charge, get repulsion from the atom, so he deducted that.......